Replacing The Stepping Motor - TEC B-680 SERIES Maintenance Manual

2. MAJOR UNIT REPLACEMENT

2.3 REPLACING THE STEPPING MOTOR

1) Remove the 4 screws (FL-4x6) to detach the front plate.
Screw (FL-4x6)
Front Plate
Screw (FL-4x6)
2) Disconnect the cable from CN14 on the I/O PC board.
3) Remove the two screws (SM-4x8), take the two belts off the pinion gear, and remove the stepping
motor.
I/O PC Board
4) When replacing the stepping motor, place the platen belt around the pinion gear first, then the feed
roller belt, so that the partition is positioned between the two belts. Press down on the stepping motor
with 3.5 Kg – 300 g force and secure it so the platen belt and feed roller belt have no slack, are
engaged ,and evenly tense.
5) Reassemble in the reverse order of removal.
Feed Roller Belt
Platen Belt
CN14
2-4
2.3 REPLACING THE STEPPING MOTOR
Screw (FL-4x6)
Fig. 2-5
Stepping Motor
Screw (SM-4x8)
Fig. 2-6
EO18-33006